Hello, I had to measure the resistance between different sets of bridge deck reinforcement steel bars using a Wavetek HD110T multimeter and a wire. The values varied between 1.9 to 2.8 ohms. When I measured the resistance of the wire itself, it came out to be 2.1 ohm. I could not understand how the resistance of wire itself is more than some of the resistance measurements taken between steel bars. If it is a common issue, can you please explain the justification? I have not much background in electrical engineering. Thank you.